James Webb Space Telescope Primary Mirror Backplane Support Structure (IMAGE)

National Institute of Standards and Technology (NIST)

James Webb Space Telescope Primary Mirror Backplane Support Structure

Caption

This image shows the complete Primary Mirror Backplane Support Structure (PMBSS) for the James Webb Space Telescope (JWST). The inset shows the location of the four support mounts of the type that NIST measured. For scale, note the assembly technician in the photo. The PMBSS is the largest single structure on the JWST and also the largest precision metrology structure that has ever been built for a NASA program.

Credit

NASA

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